import { Request, Response, NextFunction } from 'express'
import { prisma } from '../lib/prisma'
import { getAccessLevel, hasAnyAccess } from '../modules/subscriptions/subscription.policy'
import { sendUnauthorized, sendPaymentRequired } from './authHelpers'

const BLOCKED_STATUSES = ['SUSPENDED', 'PENDING']

/**
 * Blocks requests for companies with lapsed or unactivated subscriptions.
 * Must be applied after `requireTenant`.
 *
 * Guarantees on success:
 *   req.company.status is not SUSPENDED or PENDING, and subscription access is not none
 */
export async function requireSubscription(req: Request, res: Response, next: NextFunction) {
  try {
    const company = req.company
    if (!company) return sendUnauthorized(res, 'unauthenticated', 'No company context')

    if (BLOCKED_STATUSES.includes(company.status)) {
      return sendPaymentRequired(
        res,
        `subscription_${company.status.toLowerCase()}`,
        company.status === 'SUSPENDED'
          ? 'Your account has been suspended. Please contact support or renew your subscription.'
          : 'Your account is pending activation. Please complete your subscription setup.',
        { billingUrl: `${process.env.NEXT_PUBLIC_DASHBOARD_URL}/subscription` },
      )
    }

    const subscription = await prisma.subscription.findUnique({
      where: { companyId: company.id },
      select: { status: true },
    })
    const subscriptionStatus = subscription?.status ?? 'EXPIRED'

    if (!hasAnyAccess(subscriptionStatus)) {
      return sendPaymentRequired(
        res,
        'subscription_required',
        'Your subscription has ended. Please reactivate to continue.',
        {
          billingUrl: `${process.env.NEXT_PUBLIC_DASHBOARD_URL}/subscription`,
          subscriptionStatus,
          accessLevel: getAccessLevel(subscriptionStatus),
        },
      )
    }

    next()
  } catch (error) {
    next(error)
  }
}